Positive-pressure blower



(No Model.) 4 V 2 Sheets-Sheet 1'.

J. W. WILSON. POSITIVE PRESSURE BLOWER.

No. 497,108. Patented May 9, 1893.

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No. 497,108 Patented May 9, 1893.

IN ENTUR UNITED STATES PATENT Erica.

JOHN W. WVILSON, OF BROOKLYN, NEW YORK.

POSITIVE-PRESSURE BLOWER.

SPECIFICATION forming part of Letters Patent No. 497,108, dated May 9,1893.

Application filed November 23, 1891. Serial No. 412,888. (No model.

To all whom it may concern:

Be it known that I, J OI-IN W. WILSON, a citi zen of the United States,and a resident of Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements inPositive-Pressure Blowers, of which the following is a specification.

My invention consists essentially of wings pivoted in radial slots inthe conic side of a rotating piston working in a case having one sideoblique to the plane of rotation, and forming a cut-oif abutment at oneside and a way for receiving and compressing the air on the oppositeside of the axis of the piston, and it also consists of certain detailsof construction and arrangement of the parts, all as hereinafter fullydescribed reference being made to the accompanying drawings in which-Figure 1, is a central sectional elevation of myimproved blowertransversely of the shaft. Fig. 2, is a central sectional elevation inthe plane of the shaft. Fig. 3, is ahorizontal section in the plane ofthe shaft, and Fig. 4:, is an elevation of one of the covers of thecase.

In this example of my invention I represent a duplex machine whereof therim 1, of the case in which the wings I), and the rotating piston 0work, is faced obliquely to the axis at both sides and the piston isconic on both sides (1, and carries wings I), on each side making twocompression ways as e, and two outting-off abutments at f, and this isthe preferable form, but it is to be understood that single actingmachines utilizing one side only of the piston are alike available. Therim a, has a cylindrical bored section f, the width of the face of thepiston c, and it also has the oblique sections 9, bored spherically tothe axes of the pivots h, respectively and coincident with the bore ofsection f, and it has the clearance spaces i, with which inlet andoutlet passages j, j, 01' k, k, communicate, and which are separated bythe abutment Z. The covers m, consisting of plain flat disks are boltedon the oblique sides of the rim close against the sides of the piston atone side of its axis and form the aforesaid abutments f, and said coversclose the ways e, at the opposite side of the axis.

The piston is composed of two cup-shaped parts which are joined by therims recessed and fitted together one within the other at n,

i and it iucloses a hollow space; each conic side hasa slot 0, extendingacross it diametrically in which the wings I) are fitted, said wingshaving one straight edge 19 to run in. close proximity to the planesurface of the cover, while the other edgeproj ects into the hollowspaceof the piston and has the curved middle section g, on which a spring .9bears bya shoe t, to keep the outer edge in close proximity to thesurface of the cover, the wings being fitted on their pivots 72, so asto have slightmovement in that direction. The wings vibrate in theseslots and thus project in the ways e, to take effect on the airandretire to pass the abutments; the springs 3, might bear directly onthe curved parts q, of the wings but it is better to use the shoes -forprotection of the springs from wear. Any

approved form of springs may be employed but I represent in this caselong flat springs extended across the wings and secured at the endsunder hook studs it, within the hollow space of the piston. On each sideof the slots there is an inwardly projecting flange o, integralwith theside plate of the piston to atford lateral support for the wings; theslots are produced in the casting, the walls being slightly chambered asshown at the right hand side of Fig. 2, and left hand of Fig. 3, and thechambers are filled each side of the wings with anti-friction metal to,poured in against the sides of the wings first placed in position, asthe simplest way of fitting the parts and to provide bearing surfacesthat may be renewed from time to time. The shaftszr, are made separatelyand bolted on the hubs y, of the piston but they may be made integraltherewith if desired.

To protect the edges 19 of the blades from wear against the covers Ihave provided the rings 2', in the central recesses 00', of the coverswith removable anti-friction wearing rings 19,

.under them to be renewed from time to time,

and under theseI arrange the disk 0', having the hub cl, perpendicularto them for a central pivot to the revolving ring 2; this disk may alsobe packed out from time to time as ring 6 wears away through therotation of ring 2, caused by the friction of the wings bearing againstand impelling it forward. I have shown a ring as 2, in my pendingapplication, SerialNo. 343,839,but without the wear- ICO ing ring andpivot disk behind it. The covers m are bored obliquely suitably for thehubs of the piston and faced off at e, outside at right angles to thesaid bores to receive the shaft boxes g, which are bolted on at h,subject to adjustingscrews i, (Fig. 4) for setting the boxes up as theywear down. It will be seen that the air entering the piston ways at oneside or the other according to the direction the piston is turned willbe forced out at the other side by the wings which vibrate on theirpivots so as to swing out into the piston ways at one side of the axisof the piston-to take effect on the air and retire at the other side topass the abutments.

I claim 1. The combination of the rotary piston having the diametricallyslotted conic side, the wings fitted in said slot and pivoted in theaxis of the piston and in the apex of the cone, and the case having thecylindrically bored section for the piston, the spherically boredsection for the wings, and the oblique side inclosing the sphericallybored section, and with the conic side of the piston forming an abutmentat one side of said axis of the piston substantially as described.

2. The combination of the rotary piston having the diametrically slottedconic side, the wings fitted in said slot and pivoted in the axis of thepiston, and in the apex of the cone movably lengthwise of said axis, aspring pressing the wings outwardly of the piston, and the case havingthe cylindrically bored section for the piston; the spherically boredsection for the wings, and the oblique side inclosing the sphericallybored section, and with the conic side of the piston forming an abutmentat one side of the said axis of the piston substantially as described.

3. The combination of the rotary piston having the diametrically slottedconic side, the wings fitted in said slot and pivoted in the axis of thepiston and in the apex of the cone movably lengthwise of said axis, andhaving the curved bearing section within the the wings outward of thepiston and the shoe interposed between the spring, and said bearingsection substantially as described.

4. The combination of the rotary piston having the diametrically slottedconic side, the wings fitted in the slot and pivoted 1n the axis of thepiston and in the apex of the cone movably lengthwise of said axis, thecase having the cylindrically bored section for the piston, thespherically bored sect on for the wings and the oblique side inclos ngthe spherically bored section, the rotating ring, wearing ring and thedisk in the central recess of the side of the case substantially asdescribed.

5. The combination of the rotary piston having two diametrically slottedconic sides, wings fitted in said slots and pivoted in the axis of thepiston and in the apexes of the cones, and the case having thecylindrically bored section for the piston, two spherically boredsections for the wings, and two oblique sides inclosin g the sphericallybored sections, and with the conic sides forming abutm'ents at one sideof said axis of the piston substantially as described.

6. The combination of the hollow rotary piston consisting of twocup-shaped parts fitted together at the edges and having twodiametrically slotted conic sides with the slots at right angles to eachother or thereabout, wings fitted in said slots and pivoted in theapexes of the cone, springs within the hollow piston forcing the wingsoutwardly, and the case having the cylindrically bored section for thepiston, two spherically bored sections for the wings and two obliquesides inclosing the spherically bored sections, and with conic sides ofthe piston forming abutments at one side of the axis of the pistonsubstantially as described.

Signed at New York, in the county of New York and State of New York,this 1st day of October, A. D, 1891.

JOHN V. WVILSON.

Witnesses:

W. J. MORGAN, W. B. EARLL.

